Multiple bullet-mold.



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MULTIPLE auLLe MOLD.

APPLICATION FILED FEB. I9. 1918.

Patented Nov. 26,y 1918.

3 SHEETS-SHEET l.

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MULTIPLE BULLET MOLD.

APPLICATION FILED 3.19. Isla.

Patented Nov. 26, 191s.

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` MULTIPLE BULLET MOLD.

APPLICATION -FlLED if. I9. 1918.

Patented Nov. 26, 1918.

3 SHEETS-SHEET 3- WILLIAM ECKFORD, RHYL, WALES.

MULTIPLE BULLET-MOLD.

Specification of Letters Patent.

Patented Nov. 26, 1918.

Application filed February 19, 1918. Serial No. 218,146.

To all whom t 'may concern:

Be it known that I, WILLIAM EcKFoRD, a subject of the King of GreatBritain, and residing at Rhyl, in the county of Flint, North Wales, haveinvented certain-new and useful Improvements in Multiple Bullet- Molds,of which the following is a specification. This invention relates tomultiple bullet molds such as are employed for casting shrapnel bulletsof lead or the like, and the object is to provide a multiple mold bymeans of which a comparatively large number of'bullets may be cast atthe one pouring while insuring that each of 'the respective molds shallbe supplied at the required head of fluid metal necessary to producesolid castings.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is an elevation of a multiple bullet mold.

Fig. 2 is a corresponding plan.

Fig. 3 is an elevation in transverse section on the line III, III, ofFig. 1.

Fig. l is a face view of one of the two mold plates.

Fig. 5 is part face view to a larger scale.

Fig. 6 is a corresponding part longitudinal section on the line VI, VIof Fig. 5.

Figs. 7 8 and 9 are views, similar to Fig. 4, and show modications.

The multiple mold comprises two side plates or cheeks A and A', theinner faces a1 of which are recessed as herein described to form thebullet molds I), the pouring trough c and the channels or ducts Z1leading to the molds. The two plates are hinged together by a hinge pine1 the axis of which is in the plane of the abutting faces of a1 thehinge pin pivotally connects the two lugs f1 formed respectively at theone end of the bands F, the other ends of which bands are extended inthe form of handles 2 by means of which the mold is opened and closed inthe operation of bullet making. In order to insure proper alinement ofthe two plates when closed, the one A is fitted with dowel pins di whichlit accurately in the corresponding holes (Z3 on the other half A.

The respective bullet molds are formed by oppositely locatedhemispherical recesses b, the one set in the part A and the other set inthe part A.

There are several vertically disposed rows of these recesses, say ten;and the recesses.

ways by which the molten metal flows from the channels (Z1 to the moldY) and from mold to mold. The cross-section of these passage ways, whichare filled with metal when the cast is completed, is made as small as isconsistent with the proper flow of metal; the metal parts filling thepassage-ways are technically known as gets or gates, aud thesmaller'they -are the more readily the bullets separate, and the moreeasily and perfectly the bullets are stripped of the gets and assume thetruly spherical shape. It is of importance therefore to reduce the sizeof the gets to within reasonable limits, and the grouping of the moldsand the provision of end and intermediate channels to feed them permitsof this reduction. The spherical recesses are usually drilled out sothat the great circles of the groups of hemispheres, which lie on thefaces a1 of the mold are just out of contact, being separated justsufciently to form a thin partition wall in which the passage-way isformed. The channels are usually of circular cross-section and areformed half in each part of the mold plate; they communicate at theirupper ends with apouring trough c into which the metal is poured from aladle, or from the spout or tap of a lead-melting pot when the multiplemolds are used in connection with a bullet making machine. The verticalchannels d1 are connected together by a bottom duct d2.

When the metal is poured into the closed molds it passes first to thebottom of the channels d1 and along the bottom duct d2, thence to therespective groups of molds of the lower row of molds, thus filling themolds in succession from the bottom, which is a matter of considerableimportance as affecting a sound cast, inasmuch as it insures the freeescape of the air and therefore the absence of blow-holes, and theproduction of a solid cast. When the mold has cooled and the metal hasset, the mold is opened and the cast is removed, the metal which filledthe pouring trough and the channels serving, with the gets to hold thebullets together during their removal from the mold plates which is thusaccomplished with facility7 and the separation of the bullets iseffected afterward as and when desired.

In the modification'shown in Fig. 7 the bottom channel or duct Z2connecting the vertical channels may be dispensed with and `molds in thewing groups than there are in the central groups which are fed from eachend.

Having fully described my invention I declare that what I claim anddesire to secure by Letters Patent is l. The improved multiple mold forbullets comprising two hinged side plates, in the abutting faces ofwhich the bullet molds are formeel said molds being disposed insuccessive horizontal rows, the bullet molds of each horizontal rowbeing connected by communication passage-ways with each other and withfeeding channels formed in the said abutting faces and extending from apouring trough, formed in the top of the said abutting faces, to thelowest row ofv bullet molds; substantially as described.

2. In a bullet mold as claimed in claim l, arranging the bullet molds inthe several horizontal rows in groups connected by communicatingpassage-ways with each other 'and with the feeding channels;substantially as described.

3. In a bullet mold as claimed in claim l, arranging the feedingchannels obliquely, and forming the wing groups smaller than the centralgroup; substantially as described.

In witness whereof I set my hand in presence of witnesses.

W. ECKFORD. IVitnesses:

J. E. LLOYD BARNES, JOSEPH E. HIRD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, .D. C.

